Q.

Normal form of 2x+3y=7  is

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a

x Cosα+y Sinα=7

b

x Cosα+y Sinα=7113  where tanα=32

c

xcosα−ysinα=7,   where tanα=23

d

xcosα+ysinα=713,  where Tanα=32

answer is D.

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Detailed Solution

Divide by 22+32=13 ∴x.213+y.313=713 i.e., xcosα+ysinα=P  where tanα=32
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